Laboratory faucet



FIG. 1 is a perspective view of the laboratory faucet;

FIG. 2 is a front elevation view;

FIG. 3 is a side elevation view, the other side being a mirror image;

FIG. 4 is a back elevation view;

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view.

The broken lines in the Figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a laboratory faucet, as shown and described. 